122171953 has 2 divisors, whose sum is σ = 122171954. Its totient is φ = 122171952.

The previous prime is 122171947. The next prime is 122171963. The reversal of 122171953 is 359171221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91833889 + 30338064 = 9583^2 + 5508^2 .

It is a cyclic number.

It is not a de Polignac number, because 122171953 - 2⁵ = 122171921 is a prime.

It is not a weakly prime, because it can be changed into another prime (122171963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61085976 + 61085977.

It is an arithmetic number, because the mean of its divisors is an integer number (61085977).

Almost surely, 2^122171953 is an apocalyptic number.

It is an amenable number.

122171953 is a deficient number, since it is larger than the sum of its proper divisors (1).

122171953 is an equidigital number, since it uses as much as digits as its factorization.

122171953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 31.

The square root of 122171953 is about 11053.1422229156. The cubic root of 122171953 is about 496.2004709603.

The spelling of 122171953 in words is "one hundred twenty-two million, one hundred seventy-one thousand, nine hundred fifty-three".